Just checked out your website Bedford T, read a lot of good information there. I will be sure to do as you recommend as far as running some tanks through it before milling. Unfortunately, I hadn't done a proper pressure test while assembling the saw, as I just didn't have the tool necessary to do so. But I did block off the intake, impulse and exhaust and applied pressure to the crank and the cylinder held the pressure nicely. That was the best I could do without buying the leak down tester. So if I do have a leak, it is likely a small one but I am fairly confident that I do not. The saw idles nice, no fluttering. Ill be putting my tach on it when I repair the oil tube tonight to make sure my RPMs are as consistent as my ears say they are